Previous reports said Facebook planned to only charge for premium features, like integrations with third-party apps. But one company testing the service that Business Insider talked to in May said that companies would pay a per-user, per-month fee. They had been quoted a cost between $1 to $5 a user by Facebook.

Here are some pictures of the service, which we originally ran last May.

Facebook makes it easy to switch between corporate and personal accounts:

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Facebook

When you make a new Group, you choose between several types:

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Facebook

Here’s what a Group would look like.

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Facebook

The only real difference between an At Work Group and a regular Facebook Group is the left-rail options and that the Work version doesn’t have a Sell Something option.